/**
 * Copyright 2013-2020 the original author or authors from the JHipster project.
 *
 * This file is part of the JHipster project, see http://www.jhipster.tech/
 * for more information.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

const merge = require('../utils/object-utils').merge;
const JDLEnumValue = require('./jdl-enum-value');

class JDLEnum {
    constructor(args) {
        const merged = merge(defaults(), args);
        if (!merged.name) {
            throw new Error("The enum's name must be passed to create an enum.");
        }
        this.comment = merged.comment;
        this.name = merged.name;
        this.values = new Map(
            merged.values.map(entry => {
                return [entry.key, new JDLEnumValue(entry.key, entry.value)];
            })
        );
    }

    getValuesAsString() {
        return stringifyValues(this.values).join(',');
    }

    toString() {
        let comment = '';
        if (this.comment) {
            comment += `/**\n * ${this.comment}\n */\n`;
        }
        const values = stringifyValues(this.values);
        return `${comment}enum ${this.name} {\n  ${values.join(',\n  ')}\n}`;
    }
}

module.exports = JDLEnum;

function defaults() {
    return {
        values: [],
    };
}

function stringifyValues(jdlEnumValues) {
    const values = [];
    jdlEnumValues.forEach(jdlEnumValue => {
        values.push(jdlEnumValue.toString());
    });
    return values;
}
